EP0873199B1 - Hochdruckreinigungsgerät - Google Patents

Hochdruckreinigungsgerät Download PDF

Info

Publication number
EP0873199B1
EP0873199B1 EP95943185A EP95943185A EP0873199B1 EP 0873199 B1 EP0873199 B1 EP 0873199B1 EP 95943185 A EP95943185 A EP 95943185A EP 95943185 A EP95943185 A EP 95943185A EP 0873199 B1 EP0873199 B1 EP 0873199B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
housing
pressure cleaning
motor
cleaning appliance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95943185A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0873199A1 (de
Inventor
Thomas Maier
Robert Nathan
Bernd Keiner
Eberhard Veit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP0873199A1 publication Critical patent/EP0873199A1/de
Application granted granted Critical
Publication of EP0873199B1 publication Critical patent/EP0873199B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material

Definitions

  • the invention relates to a high-pressure cleaning device with one of an air-cooled electric motor driven by a gear, a piston pump comprising a swash plate on which a pump head is attached with a suction connection and a pressure connection.
  • Such high-pressure cleaning devices can contain a cleaning liquid, For example, water can be supplied via the suction connection.
  • the cleaning fluid is pressurized by the piston pump and can be connected to it via the pressure connection, for example connected pressure line are delivered.
  • the piston pump are usually provided reciprocable pistons that the swashplate. This is rotated by the electric motor offset, whereby a gear is used that the rotary movement from a motor shaft of the electric motor to the swash plate transfers.
  • air cooling is used (EP-A-0 503298).
  • the cleaning effect of such high pressure cleaning devices is from achievable pressure (for example 90 bar) and the volume of the pro Unit of cleaning fluid dispensed, i.e. the flow rate, dependent.
  • achievable pressure for example 90 bar
  • volume of the pro Unit of cleaning fluid dispensed i.e. the flow rate
  • the pump must be suitably powerful Be equipped with an electric motor.
  • this has to do with the related size of the electric motor a remarkable Weight and an unsatisfactory handling of the high-pressure cleaning device result.
  • the object of the present invention is a generic high-pressure cleaning device so that a good cleaning effect with improved handling and reduced Weight can be achieved.
  • This task is the beginning of a high-pressure cleaning device described type according to the invention solved in that the electric motor, the gear, the piston pump and the pump head in the longitudinal direction of the high-pressure cleaning device arranged one behind the other are and that the electric motor is designed as a universal motor with a stator package and a rotor, the length of the stator package is at least 1.15 times the rotor diameter.
  • Air cooling of the electric motor results.
  • a ventilation unit is used, which is an air flow generated in the longitudinal direction of the electric motor.
  • Heat dissipation is the expansion of the corresponding cooling surfaces of the Longitudinal electric motor.
  • the air cooling of the electric motor due to the longitudinal air flow also good heat dissipation the remaining parts of the high-pressure cleaning device. It has been found that by means of the configuration according to the invention the heating of the electric motor even in continuous operation relatively is kept low; this has the consequence that the electric motor can be heavily loaded even in continuous operation, without causing a Overheating is coming. Due to the effective cooling can An electric motor compared to known high-pressure cleaning devices with lower nominal power are used, the one with maximum Power can be operated so as to have the same cleaning effect can be achieved like comparable high-pressure cleaning devices with electric motors higher nominal power but less resilience. Since that Weight of the engine accounts for a significant proportion of the total weight of the High pressure cleaning device represents the use of a smaller one Electric motor for a considerable reduction in the total weight. This in turn has better manageability of the high-pressure cleaning device result.
  • a particularly effective cooling of the electric motor is achieved that a radial fan is used as a ventilation unit is positioned between the electric motor and the transmission and a Airflow from the engine towards the pump head of the high pressure washer formed.
  • the use of a radial fan has the advantage that, in contrast to the usual axial fans can also work against an existing air pressure without its speed decreases.
  • the radial fan sucks the cooling air from Electric motor on and presses them in the longitudinal direction of the high pressure cleaning device components connected to the electric motor along.
  • the cooling air comes first of all with the electric motor in contact.
  • the heat transfer from the electric motor to the cooling air is The greater the temperature difference between the electric motor, the better and cooling air is, therefore, the not yet heated cooling air a particularly good heat transfer, i.e. a particularly effective Cooling of the electric motor achieved.
  • the cooling air is then from the radial fan along the gearbox and along the piston pump in Pressed towards the pump head, where there is further heat dissipation he follows
  • the high-pressure cleaning device an the air flow along the outside of the electric motor towards one of the radial fan opposite end of the electric motor arranged collector and from there through the electric motor towards comprises the guide element guiding the radial fan.
  • the cooling air is thus initially guided along the outside of the electric motor, a flow reversal occurs at the collector and the cooling air enters the electric motor, flows through it to the radial fan and then towards the pump head of the high-pressure cleaning device.
  • This is due to the extensive contact of the cooling air the electric motor results in particularly good heat dissipation.
  • Collector of the electric motor is completely from the cooling air flows around.
  • the electric motor is therefore very powerful even in continuous operation resilient, i.e. it can run practically continuously with maximum performance be operated without overheating.
  • the guide element as the electric motor receiving motor housing is designed, which along the Forms the flow channel leading the outside of the electric motor, that connects between about the same amount as the Opening facing away from the collector end face of the electric motor of the motor housing and the collector. So there is no separate Guide element used, but the motor housing is designed in such a way that it not only protects the electric motor guaranteed, but additional guides the cooling air along the electric motor and thereby allows good cooling.
  • the motor housing forms the motor housing on the outside of the electric motor Flow channel and points away from the collector Front of the electric motor on an opening that over the Flow channel communicates with the collector.
  • the Cooling air can flow through the opening in the flow channel of the motor housing enter, then she will stay at the Along the outside of the electric motor until it hits the Collector meets where it enters the electric motor and flows through this to the radial fan.
  • the motor housing is pot-shaped with a bottom wall and a side wall protruding therefrom and that a gear housing is immersed in the motor housing, the electric motor and the gear housing at a distance from Are held inside the side wall of the motor housing and wherein an opening of the transmission housing through the electric motor is sealed.
  • the in the motor housing immersing area of the gear housing and the electric motor are spaced from the inside of the side wall the motor housing held so that the cooling air between the gear housing and the side wall of the motor housing enter the motor housing and on the outside of the Electric motor can flow down to the bottom wall. There the cooling air enters the electric motor and flows through through this to the radial fan and from this inside the Gearbox housing along the gearbox.
  • Motor and gearbox housings can each be essentially cylindrical be formed, the diameter of the motor housing exceeds the diameter of the gearbox, so that between the immersed in the motor housing Gear housing and the motor housing forms an annular gap. It is advantageous if an air-permeable, Sealing element impermeable to dust and splash water for example made of plastic.
  • An additional weight reduction of the high-pressure cleaning device can be achieved in that the motor housing and / or the gear housing are made of plastic.
  • Polypropylene for example, can be used as the plastic material Come into play.
  • the use of plastic has not only a weight saving, but it will also Manufacturing costs significantly reduced compared to the usual metal housings.
  • the high pressure cleaning device one Electric motor, the radial fan, the gearbox, the piston pump and housing shell surrounding the pumphead comprising the two essentially mirror-symmetrical Half shells is formed, each in the amount of Pump head and gear housing ventilation slots molded in are.
  • the two-shell design of the housing shell enables particularly easy assembly of the high-pressure cleaning device. For this, only the functional parts in one of the two half shells can be inserted, then the other half-shell is put on and with the first Half-shell screwed, for example.
  • the high pressure washer i.e.
  • the Housing shell preferably made of plastic, for example Polypropylene.
  • Cooling air can enter the housing shell is sucked into the motor housing by the radial fan.
  • Ventilation slots are, for example, labyrinthine be by spacing from the inside of the shell a cover covering the ventilation slots is provided is.
  • a high-pressure cleaning device 10 is shown in FIGS. 1 and 2 shown with a suction port 11, a pressure port 12 and a chemical connection 13. Via the suction connection 11 can the high-pressure cleaning device 10 cleaning liquid are supplied, which are then via the pressure connection 12th is released under high pressure. About the chemical connection 13, the cleaning liquid can contain a cleaning chemical are added so that the cleaning effect is increased becomes.
  • the high-pressure cleaning device comprises 10 an electric motor 14, on the Pressure connection 12 facing the end face of a radial fan 16 is attached to which a gear 18 and a piston pump 20 connect.
  • the piston pump 20 includes a swash plate 24, against which a plurality of pistons 26 abut, which the rotational movement of the swash plate 24 in the longitudinal direction of the High-pressure cleaning device 10 can be moved back and forth.
  • the Pistons 26 dip into a pump chamber 28 of a pump head 30 one that is in the longitudinal direction of the high-pressure cleaning device 10 connects to the piston pump 20.
  • the pump chamber 28 stands via a suction valve 32 with a suction line 34 in connection, into which a suction nozzle 36 opens, on which the suction connection 11 is arranged at the end.
  • the pump room is also located 28 via a pressure valve 36 with a pressure line 38 in Connection in which a check valve 40 and one behind the other an injector 42 are arranged and in a pressure port 44 opens out, on which the pressure connection 12 is arranged is.
  • the injector 42 is not one in the drawing cross bore shown connected to a suction chamber 46, into which the chemical connection 13 opens.
  • the high-pressure cleaning device 10 During operation of the high-pressure cleaning device 10 becomes the cleaning liquid via the suction line 34 and the suction valve 32 in pumped the pump chamber 28, pressurized there and over the pressure valve 36 and the pressure line 38 to the pressure connection 12 delivered. With the help of the injector 42, the cleaning liquid a cleaning chemical is added, sucked by the injector 42 from the suction chamber 46 which is connected to the chemical connection 13.
  • the electric motor 14 is designed as a universal motor and comprises an armature winding 48 and a stator packet 50 and one at the opposite end of the radial fan 16 Electric motor 14 arranged collector 52.
  • the electric motor 14 is in a substantially cylindrical motor housing 54 with a substantially designed as a cylinder jacket Side wall 56 and a bottom wall 58 spaced from the inside 57 of the side wall 56 held.
  • the bracket is done by means of radially projecting inwards from the side wall 56, extending in the longitudinal direction of the high-pressure cleaning device 10 Housing ribs 60.
  • Both the gear 18 and immersed in the motor housing 54 also the piston pump 20, cylindrical in shape Gear housing 62, the outer diameter of which is smaller is than the inner diameter of the motor housing 54, so that between the inside 57 of the side wall 56 of the motor housing 54 and the gear housing 62 forms an annular gap 64, in which a splash seal 66 is arranged.
  • This is made of a sponge-like, porous plastic, through which air can flow, but which is impermeable to splash water.
  • Another splash seal 68 is between the piston pump 20 and the pump head 30 positioned.
  • the gear housing 62 faces the motor housing 54 immersed end on a collar 70, on the inside the electric motor 14 lies sealingly. From the engine case 54 can therefore only cool air into the gear housing 62th get that it flows through the electric motor 14.
  • the Radial fan 16 in rotatably held on a motor shaft 22 Rotation offset, so that this cooling air from the area of Electric motor 14 sucks and towards the pump head 30 presses.
  • the sucked-in cooling air can pass through the annular gap 64 enter the inside of the motor housing 54, it then flows along the outside of the electric motor 14 in Towards the collector 52, enters the inside of the Electric motor 14 and flows through the stator 50 to the radial fan 16 and then through the gearbox.
  • the cooling air passes through the splash water seal 68 out of the gear housing 62 and then flows around the outside of the pump head 30.
  • the cooling air thus flows both along the outside of the electric motor 14 as well also through this, with the electric motor 14 particularly is long:
  • a rotor diameter of The length of the stator package is 39 mm, i.e. the extension of the stacked stator sheets in the longitudinal direction of the electric motor, 45 mm. This has a particularly effective one Cooling of the electric motor 14 result.
  • the electric motor 14, the radial fan 16, the gear 18 and the piston pump 20 and the pump head 30 from a housing shell 72 surrounded, in the amount of the gear housing 62 and the Pump head 30 substantially in the longitudinal direction of the high-pressure cleaning device aligned ventilation slots 74 formed are.
  • the cooling air passes through the level of the gearbox 62 arranged ventilation slots 74 in the housing shell and is then the radial fan 16 in the Motor housing 54 sucked and then through the gear housing 62nd pressed and finally steps over at the level of the pump head 30 ventilation slots arranged out of the housing shell 72 off.
  • the direction of the air flow is in the Drawing represented by arrows 76.
  • the housing shell 72 has an opening 78, so that the motor housing 54 has an immediate in this area Has contact with the ambient air; with that is an additional Cooling effect connected.
  • To be considered in this area To enlarge the cooling surface acting surface of the motor housing 54, are in the area of the opening 78 on the outside of the Motor housing cooling fins 80 arranged.
  • the ventilation slots 74 labyrinthine formed by the openings of the ventilation slots 74 by means of a distance from the inside the housing shell 72 arranged cover 82 covers are. Because of such a design of the ventilation slots 74 practically no splash water can get into the housing shell 72 occur.
  • the housing shell 72 is mirror-symmetrical to one another designed half-shells, the mirror plane 88, as can be seen from Figure 4 of the drawing, in the longitudinal direction of the high-pressure cleaning device 10.
  • a half shell 84 is partially shown in Figure 4. It is designed like a tub and has an upper edge 86, which is not shown in the drawing second half shell shown can be placed.
  • Both the Housing shell 72 as well as the motor housing 54 and the gear housing 62 are made of polypropylene.
  • the electric motor 14 can operate continuously due to the effective cooling can be operated practically at maximum power, so that a relatively small electric motor can be used.
  • This also has like the use of plastic for the housing shell 72 and the motor and transmission housings 54 and 62, respectively, have a considerable weight reduction and thus a better handling of the high-pressure cleaning device 10 in a row.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP95943185A 1995-12-22 1995-12-22 Hochdruckreinigungsgerät Expired - Lifetime EP0873199B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1995/005087 WO1997023308A1 (de) 1995-12-22 1995-12-22 Hochdruckreinigungsgerät

Publications (2)

Publication Number Publication Date
EP0873199A1 EP0873199A1 (de) 1998-10-28
EP0873199B1 true EP0873199B1 (de) 2004-03-03

Family

ID=8166143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95943185A Expired - Lifetime EP0873199B1 (de) 1995-12-22 1995-12-22 Hochdruckreinigungsgerät

Country Status (5)

Country Link
EP (1) EP0873199B1 (da)
AU (1) AU4433096A (da)
DE (1) DE59510870D1 (da)
DK (1) DK0873199T3 (da)
WO (1) WO1997023308A1 (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008009246A1 (de) 2008-02-07 2009-08-13 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
EP3813500B1 (de) * 2019-10-24 2023-09-20 Andreas Stihl AG & Co. KG Lüftungsvorrichtung mit spritzwasserschutz und arbeitsgerät mit einer solchen lüftungsvorrichtung
US20230381830A1 (en) * 2021-02-12 2023-11-30 Kolektor Mobility d.o.o. Hand-operated pressurized-fluid device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10340744B4 (de) * 2003-08-29 2012-03-29 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
WO2013123968A1 (de) * 2012-02-20 2013-08-29 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
DE102015117079A1 (de) * 2015-10-07 2017-04-13 Alfred Kärcher Gmbh & Co. Kg Luftgekühltes Hochdruckreinigungsgerät

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040950A (en) * 1989-08-07 1991-08-20 Northland Aluminum Products, Inc. Power washing apparatus
DE4106955A1 (de) * 1991-03-05 1992-09-10 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgeraet
IT231077Y1 (it) * 1993-12-22 1999-07-12 Pavarini Srl Idropulitrice.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008009246A1 (de) 2008-02-07 2009-08-13 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
EP3813500B1 (de) * 2019-10-24 2023-09-20 Andreas Stihl AG & Co. KG Lüftungsvorrichtung mit spritzwasserschutz und arbeitsgerät mit einer solchen lüftungsvorrichtung
US20230381830A1 (en) * 2021-02-12 2023-11-30 Kolektor Mobility d.o.o. Hand-operated pressurized-fluid device
US12465953B2 (en) * 2021-02-12 2025-11-11 Kolektor Mobility d.o.o. Hand-operated pressurized-fluid device

Also Published As

Publication number Publication date
EP0873199A1 (de) 1998-10-28
DK0873199T3 (da) 2004-03-29
WO1997023308A1 (de) 1997-07-03
AU4433096A (en) 1997-07-17
DE59510870D1 (de) 2004-04-08

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